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Major data models


Data model
Types
Data access and maintenance
Implementations
Entities, attributes, relationships None ——
Records participating in multiple linked lists Low-level API E.g. Cullinet
Hierarchically structured entities, attributes Low-level API IBM IMS
Documents: JSON, BSON, XML Low-level API, SQL-inspired languages MongoDB, CouchDB, Bigtable, ...
Tables Relational algebra, Relational calculus, SQL Dozens of products


* Committee on Data Systems Languages

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